. Canadian forestry journal. Forests and forestry -- Canada Periodicals. Canadian Forestry Journal, January, 1919 ture by seepage. This process takes a long time and generally keeps a steady supply of water flowing into the streams all summer long. In effect it acts like a huge reservoir, giving up its contents during the growing season when it is most wanted. The "humus" acts in a similar manner with rain that may fall during the summer. Again, when the humus has soaked up its fill and the water starts to run off over the surface of the ground, the roots and trunks of the trees so r
. Canadian forestry journal. Forests and forestry -- Canada Periodicals. Canadian Forestry Journal, January, 1919 ture by seepage. This process takes a long time and generally keeps a steady supply of water flowing into the streams all summer long. In effect it acts like a huge reservoir, giving up its contents during the growing season when it is most wanted. The "humus" acts in a similar manner with rain that may fall during the summer. Again, when the humus has soaked up its fill and the water starts to run off over the surface of the ground, the roots and trunks of the trees so retard its speed that it cannot assume flood proportions. The roots hold the soil together so that the little streams cannot wash it away This causes floods which wash down the soil and rocks into the valley bottoms, silt up farm lands and in some cases has been known to cover an orchard five feet deep in rocks and gravel. When the snow stops melting the run-off is over, but the damage has been done. No further water can be hoped for from that watershed unless there comes a rain and in that case the run-off will be just as quick and the benefits just as problematical. The Forest Saves Money. In all cases where a watershed is tapped for water for irrigation, reservoirs have to be se- cured. These need only be small in the case of •^-,' T*^i^^- > »•*! '-•• mA <.'-.'' * J*^. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Canadian Forestry Association. [Ottawa] : Canadian Forestry Association
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